Choose Manage→Service Tunnels from the NFM-P main menu. The Manage Service Tunnels search form opens.

Click Create→Ethernet Ring. The Ethernet Ring (Create) form opens.

Configure the required parameters.

If you set the Service Composition parameter to VPLS or VPLS and VLAN, configure the following parameters:

• Hold Time Down (centiseconds)

• Hold Time Up (deciseconds)

• Revert Time (seconds)

• Guard Time (deciseconds)

• Compatible Version

If the Service Composition parameter was set to VLAN or VPLS and VLAN, perform the following steps to configure control service defaults:

Perform the following steps:

1. Configure the VLAN Application Type parameter.

2. Select a VLAN control service.

Click Apply. The Ethernet Ring (Edit) form opens.

Click on the Components tab.

Right-click on Ring Elements and choose one of the following items:

You must create a ring element for each site in the Ethernet ring, and a path for for each of these ring elements. Each element will therefore have two endpoints from two different paths associated with it.

The Ethernet ring can only have one element configured as an RPL owner and one element configured as an RPL neighbor. This is configured using the element’s Ring Protection Link Type parameter.

The parameter values specified in Step 3 are initially populated in the Ethernet Ring Element form when creating a ring element from the Components tab, however, you can change these as required.

Only one endpoint within the entire Ethernet ring must have its Ring Protection Link Type parameter configured as Ring Protection Link End. All other endpoints in the Ethernet ring must have this parameter set to Normal.

1. Create Ethernet Ring Element with path endpoints.

   Perform the following steps:

   1. See To configure an OmniSwitch Ethernet Ring Element for information about creating an Ethernet ring element with path endpoints on OmniSwitch NEs. The element is displayed on the Components tab in Ethernet Ring (Edit) form.

   2. Repeat 1 to create more required ring elements with path endpoints.

2. Add an existing Ethernet Ring Element.

   Perform the following steps:

   1. The Select Element form opens.

   2. Click Search and select an element.

   3. Repeat 2 to select the other required ring elements.

Right-click on Paths and choose Properties. The Ethernet Ring Paths (Edit) form opens.

Click on the CFM Continuity Check tab to configure a CFM test for the path.

Configure the Auto Create Global MEG parameter.

Select a maintenance domain.

Configure the CCM Interval and Run CCM On Create parameters.

Click Select in the CFM Test panel. The Select CFM Test form opens. Perform one of the following:

1. Select the required CFM test.

2. Click Create. The Global Maintenance Entity Group (Create) form opens.

   See To create and run a Continuity Check OAM diagnostic test from the STM for information about creating the test.

   The Initial CCM Interval for the CFM test that you select or create must be set to 10 ms or 100 ms, otherwise the subsequent MEP creation fails.

Save your changes and close the forms.

End of steps